sched: Remove double_rq_lock() from __migrate_task()
[linux/fpc-iii.git] / drivers / media / usb / dvb-usb / cinergyT2-fe.c
blobc890fe46acd3966b8a1b6c0626e1d459c77d6bdd
1 /*
2 * TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
4 * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
6 * Based on the dvb-usb-framework code and the
7 * original Terratec Cinergy T2 driver by:
9 * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
10 * Holger Waechtler <holger@qanu.de>
12 * Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include "cinergyT2.h"
33 /**
34 * convert linux-dvb frontend parameter set into TPS.
35 * See ETSI ETS-300744, section 4.6.2, table 9 for details.
37 * This function is probably reusable and may better get placed in a support
38 * library.
40 * We replace errornous fields by default TPS fields (the ones with value 0).
43 static uint16_t compute_tps(struct dtv_frontend_properties *op)
45 uint16_t tps = 0;
47 switch (op->code_rate_HP) {
48 case FEC_2_3:
49 tps |= (1 << 7);
50 break;
51 case FEC_3_4:
52 tps |= (2 << 7);
53 break;
54 case FEC_5_6:
55 tps |= (3 << 7);
56 break;
57 case FEC_7_8:
58 tps |= (4 << 7);
59 break;
60 case FEC_1_2:
61 case FEC_AUTO:
62 default:
63 /* tps |= (0 << 7) */;
66 switch (op->code_rate_LP) {
67 case FEC_2_3:
68 tps |= (1 << 4);
69 break;
70 case FEC_3_4:
71 tps |= (2 << 4);
72 break;
73 case FEC_5_6:
74 tps |= (3 << 4);
75 break;
76 case FEC_7_8:
77 tps |= (4 << 4);
78 break;
79 case FEC_1_2:
80 case FEC_AUTO:
81 default:
82 /* tps |= (0 << 4) */;
85 switch (op->modulation) {
86 case QAM_16:
87 tps |= (1 << 13);
88 break;
89 case QAM_64:
90 tps |= (2 << 13);
91 break;
92 case QPSK:
93 default:
94 /* tps |= (0 << 13) */;
97 switch (op->transmission_mode) {
98 case TRANSMISSION_MODE_8K:
99 tps |= (1 << 0);
100 break;
101 case TRANSMISSION_MODE_2K:
102 default:
103 /* tps |= (0 << 0) */;
106 switch (op->guard_interval) {
107 case GUARD_INTERVAL_1_16:
108 tps |= (1 << 2);
109 break;
110 case GUARD_INTERVAL_1_8:
111 tps |= (2 << 2);
112 break;
113 case GUARD_INTERVAL_1_4:
114 tps |= (3 << 2);
115 break;
116 case GUARD_INTERVAL_1_32:
117 default:
118 /* tps |= (0 << 2) */;
121 switch (op->hierarchy) {
122 case HIERARCHY_1:
123 tps |= (1 << 10);
124 break;
125 case HIERARCHY_2:
126 tps |= (2 << 10);
127 break;
128 case HIERARCHY_4:
129 tps |= (3 << 10);
130 break;
131 case HIERARCHY_NONE:
132 default:
133 /* tps |= (0 << 10) */;
136 return tps;
139 struct cinergyt2_fe_state {
140 struct dvb_frontend fe;
141 struct dvb_usb_device *d;
144 static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
145 fe_status_t *status)
147 struct cinergyt2_fe_state *state = fe->demodulator_priv;
148 struct dvbt_get_status_msg result;
149 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
150 int ret;
152 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&result,
153 sizeof(result), 0);
154 if (ret < 0)
155 return ret;
157 *status = 0;
159 if (0xffff - le16_to_cpu(result.gain) > 30)
160 *status |= FE_HAS_SIGNAL;
161 if (result.lock_bits & (1 << 6))
162 *status |= FE_HAS_LOCK;
163 if (result.lock_bits & (1 << 5))
164 *status |= FE_HAS_SYNC;
165 if (result.lock_bits & (1 << 4))
166 *status |= FE_HAS_CARRIER;
167 if (result.lock_bits & (1 << 1))
168 *status |= FE_HAS_VITERBI;
170 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
171 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
172 *status &= ~FE_HAS_LOCK;
174 return 0;
177 static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
179 struct cinergyt2_fe_state *state = fe->demodulator_priv;
180 struct dvbt_get_status_msg status;
181 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
182 int ret;
184 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
185 sizeof(status), 0);
186 if (ret < 0)
187 return ret;
189 *ber = le32_to_cpu(status.viterbi_error_rate);
190 return 0;
193 static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
195 struct cinergyt2_fe_state *state = fe->demodulator_priv;
196 struct dvbt_get_status_msg status;
197 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
198 int ret;
200 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&status,
201 sizeof(status), 0);
202 if (ret < 0) {
203 err("cinergyt2_fe_read_unc_blocks() Failed! (Error=%d)\n",
204 ret);
205 return ret;
207 *unc = le32_to_cpu(status.uncorrected_block_count);
208 return 0;
211 static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
212 u16 *strength)
214 struct cinergyt2_fe_state *state = fe->demodulator_priv;
215 struct dvbt_get_status_msg status;
216 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
217 int ret;
219 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
220 sizeof(status), 0);
221 if (ret < 0) {
222 err("cinergyt2_fe_read_signal_strength() Failed!"
223 " (Error=%d)\n", ret);
224 return ret;
226 *strength = (0xffff - le16_to_cpu(status.gain));
227 return 0;
230 static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
232 struct cinergyt2_fe_state *state = fe->demodulator_priv;
233 struct dvbt_get_status_msg status;
234 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
235 int ret;
237 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
238 sizeof(status), 0);
239 if (ret < 0) {
240 err("cinergyt2_fe_read_snr() Failed! (Error=%d)\n", ret);
241 return ret;
243 *snr = (status.snr << 8) | status.snr;
244 return 0;
247 static int cinergyt2_fe_init(struct dvb_frontend *fe)
249 return 0;
252 static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
254 deb_info("cinergyt2_fe_sleep() Called\n");
255 return 0;
258 static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
259 struct dvb_frontend_tune_settings *tune)
261 tune->min_delay_ms = 800;
262 return 0;
265 static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe)
267 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
268 struct cinergyt2_fe_state *state = fe->demodulator_priv;
269 struct dvbt_set_parameters_msg param;
270 char result[2];
271 int err;
273 param.cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
274 param.tps = cpu_to_le16(compute_tps(fep));
275 param.freq = cpu_to_le32(fep->frequency / 1000);
276 param.flags = 0;
278 switch (fep->bandwidth_hz) {
279 default:
280 case 8000000:
281 param.bandwidth = 8;
282 break;
283 case 7000000:
284 param.bandwidth = 7;
285 break;
286 case 6000000:
287 param.bandwidth = 6;
288 break;
291 err = dvb_usb_generic_rw(state->d,
292 (char *)&param, sizeof(param),
293 result, sizeof(result), 0);
294 if (err < 0)
295 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
297 return (err < 0) ? err : 0;
300 static void cinergyt2_fe_release(struct dvb_frontend *fe)
302 struct cinergyt2_fe_state *state = fe->demodulator_priv;
303 kfree(state);
306 static struct dvb_frontend_ops cinergyt2_fe_ops;
308 struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
310 struct cinergyt2_fe_state *s = kzalloc(sizeof(
311 struct cinergyt2_fe_state), GFP_KERNEL);
312 if (s == NULL)
313 return NULL;
315 s->d = d;
316 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
317 s->fe.demodulator_priv = s;
318 return &s->fe;
322 static struct dvb_frontend_ops cinergyt2_fe_ops = {
323 .delsys = { SYS_DVBT },
324 .info = {
325 .name = DRIVER_NAME,
326 .frequency_min = 174000000,
327 .frequency_max = 862000000,
328 .frequency_stepsize = 166667,
329 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2
330 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4
331 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8
332 | FE_CAN_FEC_AUTO | FE_CAN_QPSK
333 | FE_CAN_QAM_16 | FE_CAN_QAM_64
334 | FE_CAN_QAM_AUTO
335 | FE_CAN_TRANSMISSION_MODE_AUTO
336 | FE_CAN_GUARD_INTERVAL_AUTO
337 | FE_CAN_HIERARCHY_AUTO
338 | FE_CAN_RECOVER
339 | FE_CAN_MUTE_TS
342 .release = cinergyt2_fe_release,
344 .init = cinergyt2_fe_init,
345 .sleep = cinergyt2_fe_sleep,
347 .set_frontend = cinergyt2_fe_set_frontend,
348 .get_tune_settings = cinergyt2_fe_get_tune_settings,
350 .read_status = cinergyt2_fe_read_status,
351 .read_ber = cinergyt2_fe_read_ber,
352 .read_signal_strength = cinergyt2_fe_read_signal_strength,
353 .read_snr = cinergyt2_fe_read_snr,
354 .read_ucblocks = cinergyt2_fe_read_unc_blocks,